Q3 / 160 · AP EAMCET 2023 (19 May Shift 1) · Chemistry

An oxide of chlorine with water gives the strongest acid. The ratio of chlorine and oxygen in its formula is

  • A
    2:1
  • B
    $1: 2$
  • Correct answer
    C
    $2: 7$
  • D
    $1: 3$

Solution

Chlorine heptoxide $\mathrm{Cl}_2 \mathrm{O}_7$ reacts with water to give perchloric acid $\mathrm{HClO}_4$ which is the strongest acid. Thus, the ratio of $\mathrm{Cl}$ to $\mathrm{O}$ is $2: 7$.

Hence, the correct answer is option: 'C'.

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